Mold for constructing hollow walls of concrete



J. 8. RICHARDSON.- MOLD FOR CONSTRUC HNG HOLLOW WALLS 0F CONCRETE.

APPLICATION FILED MYAY-5, I919.

Patnted 11211127, 1920.

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J. R. RICHARDSON. MOLD FOR CONSTRUCTING HOLLOW WALLS 0F CONCRETE.

Y APPLICATION FILED MAY 5, I9?- -1,329,095, Patented Jan. 27, 1920.

2 SHEETS-$HEET 2- 1121i cjaizz fiz'ciai'd son anonwg JOHN R. RICHARDSON,or MADEBA, CALIFORNIA.

MOLD FOR CONSTRUO'I'ING HOLLSW \VALLS OF CONCRETE.

Application filed May 5, 1919.

A To all whom it may concern Be it known that 1, JOHN R. RIorrARnsoN, acitizen of the United States, residing at Madera, .in the county ofMadera and State of California, have invented certain new and usefulImprovements in Molds for Constructing Hollow Walls of Concrete, ofwhich the following is a specification.

This invention relates to certain improvements in molds which are usedin the construction of hollow and reinforced walls from concrete orother similar material and is designed as an improvement upon theconstruction of molds as shown in Letters Patent of the United Statesdated September 18, 1917, which are numbered 1,240,435 and 1,240,436.

In carrying my invention into practice, I provide a plurality ofcomplementary abutment forming members which when associated aremaintained opposite one another, they being of a length sufficient tomold one story of a building and are of such configuration as to provideon the inner sides of the walls inward projecting abutments withconverging sides and truncated ends, said Opposite abutments beingconnected by tiebars, which tie-bars and the inner and outer mold platesare associated or maintained in position by the abutment formingmembers.

One of the objects of the invention is to provide abutment formingmembers of similar configuration which have recesses in their abuttingedges to receive tie-bars, the tie-bars being maintained in position byclamps, the aforesaid members being made of wood are engaged by thepointed ends of lag screws which are used to connect the outer moldboards or plates to the abutment forming members.

In the accompanying drawings which illustrate a preferred embodiment ofmy invention, Figure 1, is a perspective View of the mold partlyassembled. Fig. 2, is aperspective view of a pair of the abutmentforming members of the mold. Fig. 3, is a perspective view of one formof clam for holding the ties in engagement with the abutment formingmembers while assem- {bling the parts of the mold. Fig. 4, is a planView of the mold set up and partly filled with concrete. Fig. 5,v is ahorizontal section of a portion of the mold, and Fig. 6, is aperspective view of one of the outer mold plates.

Preparatory to setting up the mold or Specification of Letters Patent.

Patented Jan. 27', 1920.

Serial No. 2941795.

forms I lay a concrete foundation 7, in which is partly embedded a board8, the width of which board determines the width of the air spacebetween the inner and outer walls. Abutment forming members 9, which areof a length about the height of one story of the building, are set up sothe inner faces of their lower ends will bear against the edges of theboard 8, with their lower ends resting upon the foundation 7, and theymay be maintained in a vertical position by a top plate 10, to theunderside of which is secured a spacing strip 11, of the same width asthe board 8. The abutment forming members are each of like shape, theinner and longer sides 12, having reduced abutting edges, which have atsuitable intervals recesses 13, which may be either round or fiat toaccord with the shape, in cross section, of the tiebars 14. Thethickness of the members 9, which are shaped to provide abutment formingrecesses which determine the size and shape of the abutments, thethickness of the walls between the abutments being fixed by the distancebetween the inner face of the reduced portions of the members 9.

When a pair of opposite or inner and outer members have been placed inposition and the top plate placed thereon, the other end beingmaintained against the edge of the dividing strip 8, the tie-bars areindividually placed and maintained in position by suitable clamps, asshown in Fig. 3, and when successive tiebars are positioned another pairof the abutment forming members are erected, and the clamps are removed.

A top plate 10 is temporarily attached to the members 9, and when thefour pieces or two pairs of the abutment forming members are in place;four others are erected in a similar manner they being spaced asdesired, to provide any suitable distance between the abutments of thecompleted walls. The space between adjacent mold forming sections isspanned by inner mold plates 15, which are provided adjacent to theirupper edges with apertures for tacks, or the like, to hold the plates inplace, which tacks are removed before the concrete in filling the formsreaches them.

Vertical reinforcing bars 16, are engaged by the bent or looped ends ofthe tie-bars 14:, the upper ends of the bars 16, engaging with the edgeof the top plate 10, said bars being in line with the center of thetruncated portion of the abutments and near the center of the Walls. Theend portions of the tie-bars 14, are connected to the vertical bars 16and to horizontal bars 17, which rest upon and are secured to thetie-bars 14; and to the vertical bars 16.

The outer mold plates 18, may be either of planks of wood or strips ofsheet metal and they are provided with openings for the passage oflag-screws 19, which openings are spaced so the screws may enter theouter faces of the abutment forming members to hold the outer moldboards in place, the inner faces of the boards or plates 18 engage withthe blocks or strips 20, which serve as closures for the ends of themold and at the same time determine the thickness of the walls, exceptat the abutments. When the outer mold plates are of wood the lag-screwswill hold in place cleats 21, which are of a length to engage the faceof the adjacent mold board, and when the outer mold plates are of sheetmetal, as shown by Fig. 6, me tallic cleats will be' riveted to theupper edges thereof.

In molding the corners I use sheet metal or other suitable material inthe construction of the elements or parts 22 and 23, as shown by Fig.4:, such parts being shaped to provide inward extending abutment formingportions, and when such parts 22 and 23 are of sheet metal they will beprovided near their upper edges with perforations to receive tacks ornails, that temporarily attach the same to the sections 9.

With the means herein set forth, or shown by the drawings I can cast orpour walls of concrete or other cement mixture, which walls will have anair space of a predetermined size, and except as to the abutments thewalls may be of any desired thickness, within the limits of the lengthof the lagscrews.

It will be noted that the invention herein set forth provides verticallydivided abutment forming members which support the tie-bars and whichalso maintain all reinforcements of the wall and the inner and the outermold plates, and that each section of the abutment forming members areof like construction and of a length and size suiiicient' when assembledto carry all the parts required to mold an entire story of a build mg.

The clamp shown by Fig. 3. consists of a fiat bar 24, of suitablematerial that has near one end a recess 25 and at a suitable distancetherefrom a perforation to receive a pin 26. In use the pin 26 beingremoved the recessed end of the bar is inserted in the space betweenopposite pairs of vertical members or supports to engage with a tie-barto place the same in a recess 25 in the bar 24, the bar being moved todraw the tie-bar in one of the recesses 13, the pin 26 is then insertedand by depressing the end of the bar that carries the pin such pin willbe forced into engagement with the edges of the members 9, as shown byFig. 1, thus holding a tie bar in place until an opposite member orsupport has been erected, separate clamps being used for each of thetie-bars, it being noted that the recesses 13 space the tie-bars 14which are held in place by the clamp and that the removable pin 26thereof engages the sides of two of the members 9 and holds the tiebarin the recess 18. until abutting members are placed in position when therecesses in the abutment forming members will maintain the tie-barswhich tie bars may be either flat or round.

It will be noted that the tie-bars 14, are of such length that the endsthereof will be located at a considerable distance beyond the abutmentsand that the vertical bars 16 engage the looped ends of the tie-bars 14that support the horizontal bars. and in practice the bars are tied toeach other as shown.

With a mold of the character hereinbefore described, no scaffolding isrequired and the ties and all reinforcing bars are maintained in placewhen the mold is set up, which I consider an advantage over placing theties and reinforcements during the filling of the molds with concrete.

It will be noted that the top 10, is of less width than the distanceetween the outer faces of the walls, to allow a space for completing thefilling of the wall forming chamhers, and that the construction andarrangement of parts are such as to dispense with collapsible innerforms.

Though I have shown a preferred construction for molding a hollow wall,a part of which consists of oppositely located interior abutments,vertically located and connected by comparatively thin portions. suchwalls having continuous air spaces, I do not limit myself to the preciseconstruction of the parts shown, as the size may be varied and theconstruction modified without departing from my invention, as set forthor pointed out by the claims.

The abutment forming members and supports though preferably of wood maybe of wood faced with metal particularly when outer forms or planks arenot used and the cement is applied with a concrete gun. The abutmentforming members can be spaced to provide the door and window openingsand will carry the frames thereof.

I claim 1. In a mold for molding in sz'tu hollow walls having oppositelylocated and inward extending abutments with converging sides andtruncated ends, a pair of similarly shaped supports which whenassociated provide means for forming the abutments and tie-bars forconnecting the abutments which are maintained between the supports thatconstitute the abutment forming members.

2. In a mold for constructing hollow walls having abutments, a pair ofabutment forming members provided with reduced longitudinal edges inwhich are formed recesses that constitute means for supporting tiebars.

3. In a mold for use in constructing hollow walls with abutments,vertically maintained supports for inner and outer mold plates whichconstitute abutment forming members the engaging edges thereor beingprovided with tie-bar receiving recesses.

4:. In a mold for use in the construction of concrete walls, separablesupporting members each of which have parallel inner and outer faces, anend at right angles thereto, an angular face and a reduced portion,means for maintaining a plurality of such members to provide abutmentforming parts of the mold, and means for associating inner and outermold plates with the outer faces of the supporting members.

5. In a mold for hollow walls which have inward extending abutmentswhich are connected by tie-bars, vertically divided supports whichconstitute mold sections, reduced abutting portions in which are formedrecesses for tie-bars, and means for associating with said verticallydivided mold sections and supports inner and outer mold plates.

6. In a mold for hollow walls, a plurality of abutment forming members,for inner and outer mold plates, means for removably attaching the innerand the outer plates to said abutment forming members, andlongitudinally disposed spacing means that are engaged by the abutmentforming members.

7. In a mold for forming walls with abutments, a vertical support and acomplementary support each in cross section being of the same shape andadapted when reversed to be used as abutment forming members of a moldand as carriers for inner and outer mold plates; when the plates areassociated therewith to form the Walls with which the abutments areintegral.

8. In a mold for use in forming hollow walls having oppositely locatedabutments with converging sides and truncated ends, of a pair ofabutment forming members and supports for other members of a mold, theabutment forming members having reduced portions the edges of which areadapted to abut and recesses in such reduced portions.

9. In a mold for forming walls having integral abutments, an abutmentforming means comprising two members which in cross section arehexagonal the same being formed by the removal of a trapezoidal portionfrom one corner which is of less width than the width of the members, toprovide with other parts of the mold a wall having abutments with flatends and inclined sides.

10. In a mold for use in the construction or" walls having abutments,the combination of a plurality of vertical members which are assocatedin pairs each pair being of such transverse configuration as to providean abutment forming recess, mold plates which are associated with saidmembers beyond the abutment forming recess and other mold platesmaintained in parallel relation thereto.

11. In a mold for use in constructing walls which are provided atintervals with abutments, a pair of vertical members which whenassociated provide means for molding the abutments, mold plates whichare adapted to be removably attached to the vertical members to span thespaces beyond the ends thereof, mold plates which are spaced beyond theabutment forming members and means for maintaining such mold plateswhich engage with the abutment forming members.

JOHN R. RICHARDSON.

